文章信息/Info

Title:

Research Progress of Refractory High-Entropy Alloys

作者:

劉張全; 喬珺威

（太原理工大學(xué)材料科學(xué)與工程學(xué)院 高熵合金研究中心，山西 太原 030024）

Author(s):

LIU Zhangquan;  QIAO Junwei

(Research Center for High�睧ntropy Alloys, School of Materials Science and Engineering,Taiyuan University of Technology, Taiyuan 030024, China)

關(guān)鍵詞:

高熵合金; 難熔合金; 微觀結(jié)構(gòu); 力學(xué)性能; 耐磨性; 高溫抗氧化性

Keywords:

high-entropy alloys;  refractory alloys;  microstructure;  mechanical properties;  wear resistance;  high temperature oxidation resistance

分類號:

TG132��3+2；TG139

DOI:

10.7502/j.issn.1674-3962.201812016

文獻標志碼:

A

摘要:

高熵合金是一種不同于傳統(tǒng)合金的新型合金，由5種或5種以上的主要元素組成，每種元素的原子數(shù)分數(shù)在5%~35%之間。其中基于難熔元素的難熔高熵合金以其優(yōu)異的高溫性能引起了人們的廣泛關(guān)注。難熔元素是指熔點高于1800 ℃并有一定儲量的金屬，金屬鎢是其中典型的代表。難熔高熵合金的定義進一步延伸為含有3種或3種以上主要元素且元素的原子數(shù)分數(shù)可大于35%后，得到了更加迅速的發(fā)展。首先介紹了難熔高熵合金的制備方法、微觀結(jié)構(gòu)和相組成；闡述了難熔高熵合金室溫和高溫力學(xué)性能、主要的強化機制、耐磨性及高溫抗氧化性；最后討論了難熔高熵合金面臨的挑戰(zhàn)和潛在的應(yīng)用。

Abstract:

Being different from traditional alloys, high-entropy alloys are composed of five or more principal elements. Moreover, the concentration of each element is between 5at% and 35at%. Due to their excellent high-temperature performance, high-entropy alloys attract the interest of many researchers. Refractory elements are metals with a melting point above 1800 ℃ and a certain amount of reserves, represented by tungsten. Subsequently, After their principal elements can be three or more kinds and the concentration of each element can be more than 35at%, refractory high�瞖ntropy alloys have achieved rapid development. The preparation methods, microstructure, and phase composition of refractory high-entropy alloys were introduced. The properties of refractory high-entropy alloys were described, including room-temperature and high-temperature mechanical properties, main strengthening mechanisms, wear�瞨esistant performance and high-temperature oxidation resistance. Finally, the challenges and potential applications of refractory high-entropy alloys were discussed in detail.